Actuating mechanism for concentrators.



W. L. 8; F. S. CARD. AGTUATING MECHANISM FOR CONGENTRATORS. APPLICATION IILEDMAY 26, 1905 907,736. Eatented Dec.29,1908.-

2 SHEBTSSHEET 1\ Wituemm W. L. & F. S. CARD.

AGTUATING MEGHANISM FOR UONCENTRATORS.

APPLICATION FILED MAY 26, 1905.

907,736. Patented Dec.29,1908.i

2 SHEETSSHEET 2.

66W mw u, aim/ {4M UNITED STATES PATENT ornroa WILLIAM L. CARD AND FRANK s. CARD, OF-DENVER; COLORADO, ASSIGNORS TO THE CARD MANUFACTURING COMPANY, or DENVER, COLORADO. A CORPORATION OF COLORADO ACTUATING MECHANISM FOR CON GENTRATORS.

' Specification of Letters Patent.

Patented Dec. 29, 1908.

Application filed. May 26, 1905. Serial No. 262,418.

Denver and State of Colorado, have invented certain new and useful Improvements in Ac tuatmg aiechanismfor Concentrators; and we do hereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention'relates to the construction and application to ore concentrators of mechanism for imparting thereto a reciprocating movement whereby the metallic particles contained in the comminuted ore are caused to traverse the length of the table and to be discharged therefrom, and is especially di- 30 rected to that class of mechanism whereby an accelerated forward movement, and a retarded return movement is effected, said.

move1nent being'of such character that the stratification of the metallic particles on the table will not be destroyed or disturbed.

Devices of this class where usually employed, as for instance, adjacent to dry crushing mills, are surrounded by an atmosphere charged with dust and grit which materially and injuriously affects the bearings, causing rapid wear of the same and demanding constant lubrication and frequent replacement of parts; In addition thereto, such devices are commonly committed to the care of un- 5 skilled labor, and, if of a complicated character as to construction or adjustment, occasion loss of time and values, as well as much annoyance in adjustment.

The object, therefore, of our present invention is to simplify the construction, facilitate adjustment and lubrication of bearings, and enhance the durability of this class of dev1ces.

To this end one feature of our invention,

15 generally stated, resides in a mechanism for actuating concentrator tables, wherein the co-acting elements are comprised of vibrating members havin rolling contact, the pointof'contact rece ing from one center of 5;) motion and simultaneously approaching the other center of motion, so that a radual acceleration and gradual retardation of the concentrator table is alternately effected and the power applied with greatest advantage.

A. further feature of our invention resides ots and bearings thereof, whereby labor is saved and the life of the mechanism prolonged.

There are other features of the invention, residing both in special combinations and elemental construction, all as will hereinafter more fully appear.

In the drawings accompanying this specification, and forming part of the same, Figure 1 is a plan view of a mechanism embodying our invention, the cover thereof removed, and so much of a concentrator table as is required to illustrate the relation and operation of the devices being shown in connection therewith. Fig. 2 is a longitudinal vertical section of the same on the line 2-2, Fig. 1. Fig. 3 is a transverse vertical section on the line 3-3, Fig. 1. Fig. 4 is a front elevation of the mechanism, the concentrator table omitted. Fig. 5 is a front elevation of the forked link or pitman whereby the power is transmitted from the crank shaft to the vibrating members of the mechanism. Fig. 6 is a side elevation of the forked link orpitman. Fig. 7 is a side elevation of the saddle-brass interposed between the crank andthe forked link or pitman. Fig. 8 is a top view of the saddlebrass shown in Fig. 7. Fig. 9 is a perspective view of the equalizing block or key interposed between the pitman and the saddlebrass. Fig. 10 is a view of the inner face of the adjustable contact-plate of the vibrator.

Fig. 11 is a plan view of the adjustable contact-plate of the vibrator.

Like symbols refer to like parts wherever they occur.

We will now proceed to describe our invention more fully so that others skilled in the art to which it appertains may apply the same either in the form chosen for illustration or in such modified form thereof as circumstances may require.

In the drawings, 1 indicates a suitable bed plate for the support of the operative members of the mechanism, said bed-plate being rovided with a'flange 2 whereby it may be holted or otherwise attached to a proper subframe or foundation by bolts 2". tial portion of the bed plate is depressed to form a sink or tank for a lubricant, as at 3, said sink or tank being provided with an out let 3* through which the tank may be emp- The centhe vibratingmembers B, C, of the mech I tied, and by means of which hot water or wear and lost motion, but also, and espeother suitable fluid may be introduced and cially, to regulate the operative length of the the tank flushed for the purpose of cleaning pitman whereby the charactef'ofthe reciprothe same. Within the tank 3, at opposite cation of the table is controlled, a set screw po1nts,'and preferably in the same horizontal l 8 is passed through the upperend of pitman plane, are babbitted seats or bearings 23* 3 D, and, in order to insurethe proper autofor the reception of the .pivots or journals of matic adjustment of the saddle-brass 7 with relationto the crank 6 and the pitman D, anism. The power and crank shaft F is i said setscrew 8 is stepped in a semicylinournaled in suitable bearings 8 located on l drical block or key 9 provided with a concave opposite sides of the tank 3 at the top thereof an intermediate the bearin s 3 3.

- The bed-plate 1 is strengt ened by longitudinal partitions 3. forming side chambers or wells 4, 4 for chain'elevators I which convey the lubricant to the bearings of the crank shaft, .said partitions being perforated or slotted below as at 4 to communicate with the main body of tank 3. The bearings 3 are provided with grooves, as at 3", which communicate with the tank through pa'ssages 3* whereby all oil finding its Way towards the ends of shaft F will be returned to the tank, and none of the lubricant will be wasted.

5 indicates the cover for the tank 3 and contained mechanism, said cover having a suitable opening 5 for the passage of the vibrator by means of which movement is imparted to the table T. If desired, the cover 5 may be provided with a hinged section 5 whereby the lubricant may be-introduced into tank 3 and the operative parts inspected, and an oil cup such as5 may alsc be provided, though, if preferred, other provision,

may bel'made for the introduction of the oil and the inspection of the mechanism. The main cover 5 may be bolted or otherwise secured to the combined tank and bed plate.

F indicates the crank shaft which may be provided with suitable means for applying power'thereto to cause a-rotation thereof, as, or example, the fast and loose pulleys F F -'l'he shaft F which is jouinaled in the bearings 3 3 of the combined tank and bedplate, is provided at its center with the crank section 6 on which is seated a saddle-brass 7 that in turn carries the upper end of a forkedlink or pitman D by means of which the vibrating members of the mechanism are actuated. 'Ihe'pitman D, which is prefe1ably bifurcated or forked for pivotal con ection by its lower end with 'one of the vi rating members of the mechanism, may also be slotted laterally and otherwise so shaped above and internally as to receive and accommodate a saddle-brass 7- which is interposed'between the crank 6 and the upper end of the pitman; and the lower ends of the pitman may -be bored as at d to receive the pivot pin or 'ournal by which the pitman is connected with the free end of one of the vibrating members of the mechanism.

r In orderto provide for ,the vertical adjust.

ment of the pltman D, not only to take up i seat in the top of thesaddle-brass so that the saddle-brass may at all times accommodate itself to the crank and pitman.

lating members of the mechanism, and C the other, the former being pivoted at one end on the bed-plate 3, as at 3, and being pivoted at its opposite end to the pendent end of the itman 1) from which. it receives motion. 'i he other vibratory or oscillating member 0 which communicates the motion to the concentrator table is also pivoted o n'the bedlate, as at 3, and engagesthe member B from which it receives motion, either directly or mediately through intervening elements if so desired. 'ihe first of these vibratory members B is curved upon its upper orcontacting surface, as at b, and in order to insure durability in service said portion-of the member B may be chilled in casting, or otherwise hardened or protected. It will be l constitutes the arc of a curve of long radius which effects a rolling contact between said an. accelerated forward motion and a retarded rearward motionas the rolling contact between the members automatically and alternately shifts from and toward the respec tive pivots of the members'.- 'l-he second of these vibratory or oscillating members C is preferably given the form of an elbow lever pivoted on thebed-plate at its angle, as at 3, with one of its arms 0 arranged to-overlap and contact directly with, or to otherwise receive motion from, the member B, and in case ofdirect contact it is referred to insert in said arm 0 orsecure t ereto a renewable steel late 0 secured by-screws c or in other suita le-manner.- e v For purposes of'this specification, the vertical' arm. chef the vibratory, or oscillating memberQ-Qfvvhich communicates movement tothe table, we have herein termed the vibratoraringthe same being provided on its front fwith'a channel 10 for the reception of a sliding contact-plate'G, said channel being closed 'abcve 'by the perforated-end wall or plate 10" ftli'roii'gh which passes a screw rod isadjuste'di p G indicates the-sliding contact-plate car- B indicates one of the vibratory or oscilnoted that the slight curvature b of the I memberB and the member C, and results in y means ofwhich the sliding contact-plate table 't.' It will be noted, that as the memally vibrating members B through the meively house and. protect the mechanism and said tongue or projection being provided with the said jam-nut H will be set home to lock submerge or partially submerge the several the mechanism. The cover 5 being in place ried by the vibrator arm, said plate having on its rear face the tongue or projection 9 (preferably semi-circular) it hereby it may be connected to and guided on the vibrator,

a threaded opening or nut g through-which passes the threaded bolt by which the adjustment of said contact-plate is etiected, .the outer face of the contact plate is convex or curved as indicated at 9 so that the movement of the vibrator is atgmented, without change of character, in being communicated from the vibrator arm 0 to the concentrator ber C receives its motion from the harmonic dium of the rolling contact I), so it also transmits said motion at gmented to the table T through the medium of the rolling contact at 9 H indicates the threaded rod whereby the contact-plate is adjusted on the vibrator, said rod having on its upper end a handwheel H and below the latter a hand-u heel and jam-nut H Vi ithin the channel or groove 10 of the vibrator arm, and below the perforated end wall 10, a collar h is secured to the threaded rod by a pin or otherwise, so that the threaded rod may revolve freely in the end wall 1O throtgh which itpasses and thrs raise or lower the contact-plate G on the vibrator according to thedirectio'n of rotation of said rod 11 In order to permit the rotation of rod H, the jam-nut H is first eased off, and after the proper adjustment of the sliding contact-plate G has been efi'ected the parts in fixed position.

I, 1 indicates endless chain belts which encircle the power orcfank shaft F and are pendent in the wells 4, 1, from which they so ply the lubricant to said shaft.

Vhen in service, the tank 3 may be filled with lubricant to about the level 'of the flange 2 of the bcd plate or sufficiently to bearings 3" 3 d, the splash from the tank oil, together with the lubricant elevated by the endless chainsl, I will serve to maintain the lubrication of the remaining bearings. of

upon the tank of the bed-plate will efi'ectits bearings from any dust and grit carried in the air. Q

In operation power will be applied in any suitable manner and from. any suitable source to rotate the shaft F and crank 6 from which movement is communicated through link or itman I) to the vibratory or oscillating member-B.

T he, hiracter of the movement of member B, andof the member C actuated thereby, will depend on the length of pit man D, and I this can be adjusted by means of the set 'pivotiof the vibrator arm 0 111 the position of rest, in the preferred construction, or that illustrated in the drawings, that is to say with the crank 6 in its lower position, the contact between the vibratory members B and C will be on that side of the median line nearest the pivot 3 of the member, or in a position to exert greatest leverage when assuming the load on the forward stroke of the table, and as the crank 6 and pitm'en l) gradually rise for the first half of the reolution of the crank, the rolling contact between the vibrating members l5 and (i will progressively approach the pivot of the member 0 thus reducing the leverage and steadily accelerating the forward movement of the vibrator arm 0, such movement being imparted to the table throughthe medium of the curved contactplate U, the initial contact of which with the table buffer K is at the lowest point of its curved face. As the forward movement of the vibrator arm 0 progresses, the contact between the curved plate G and butler is transferred to and beyond the most advanced point of said curved face 9 of the contact-plate, thus augmenting the length of the stroke oi the table without altering its character, and at the close of the stroke, or when the centers of the crank the pivot d which connects. the lower end of pitman D and the member B are in alinement, there is an imperceptible instant of rest before the This backward movement of the table may be due to the reaction of the usual spring, or may be accomplished in any other suite able manner, several modes being known to mechanics and thoseskilled in the art.

On the return or rearward movement of the table, which occurs during the descent of crank 6 and pitman l), the greatest leverage of the reactive devices of the table on the vibrator member (7 will be exerted when the contact between the curved contact-plate G and the table butler K is farthest from the pivot 3 of the member 0, and this leverage will gradually decrease the rolling contact between member B and the arm a of member C progressively recedes trom the pivot point 3 of member C and approaches the pivot point 3* of member B, thus producing a retarded return movement of the table from the same causes operating in reverse manner. At the rear end of the stroke there is a period of comparative rest of much longer duration than the quickly reversed movement at the forward end.

As a result of the construction hereinbel fore set forth, itwill be noted that extreme simplicity of construction is obtained with accompanying facility of ad ustment and repair, that an effective automatic lubrication of the bearings, which reduces the labor and attention required in operating themechanism or movement and increases its durability is attained, and that such an arrangement of the leverage as conserves power and perfectly controls the acceleration and retardation of the stroke of the table is effected.

Having thus described our invention, what We claim and desire to secure by Letters Patent is:

points of said members, a pitman connectedwith one of said members, and means for actuating saidpitman.

2. In combination with a concentrator table, mechanism for alternately imparting thereto an accelerated forward and a retarded rearward motion, comprising a plurality of ivoted members one of which has a slig itly'curved face which extends from the floating end of said member towards its pivot for at least-one half the length of said member, the members arranged to overlap and have a rolling contact which alternately recedes from and approaches the. respective pivot points of said members, and a pitman connected with the floating end of the underlying one of said members for actuating said member.

v retarded rearward motion, comprising a plurality of pivotedmembers one of which has a slightly curvedfacewhich extends from its floating end towards its pivot for at least half the length of said member, saidmenk Lers arranged to have a rolling contact which alternately recedes from and approaches the man.

table, mechanismfor alternately imparting thereto an accelerated forward motion and a retarded rearward motion, said mechanism comprising a plurality of vibratory members one of which receives motion through the in termediacy of a rolling contact and also imparts motion to the table through the intermediacy of a rolling contact.

6. In combination with a concentrator table, mechanism for alternately imparting thereto an accelerated forward motion and a retarded rearward motion, said mechanism comprising a plurality of pivoted vibratory members one of which receives motion through the intermediacy of a rolling contact and also imparts motion to the table through the intermediacy of a rolling contact.

7. In combination with a concentrator table, mechanism for imparting thereto an accelerated forward motion and. a retarded rearward motion, said mechanism comprising a plurality of vibratory members, one of which is a harmonically vibrating member, and one of which receives motion through the intermediacy-of a rolling contact and also transmits motion to the table through the intermediacy of a rolling cont-act.

8. In combination with a concentrator table, mechanism for alternately imparting thereto an accelerated forward motion and a retarded rearward motion, comprising a plu 5. In combination with a concentrator" rality of pivoted members, one of which has a curved face which extends from its floating end toward the pivot forat least half the length of the member, said members arranged to overlap and having a contact .which alternately recedes from and approaches the respective pivots of said memers, one of said members being an elbow lever, adjustable means for actuating said members, and an adjustable slide having a curved face located on the vibrator arm of the elbow lever member.

9. In combination with a concentrator table, mechanism for alternately imparting thereto an accelerated forward motion and a retarded rearward motion, comprising a plurality of pivoted members one of which has a slightly curved face which extends from the floating end towards the pivot for at least .half the length of said member, the members ar 5 pivots of said members, one of said members being an elbow lever, an adjustable slide havmg a curved face located on one arm of said elbow lever member, and an adjustable pit man for actuating said members.

10. In combination with a concentratortable, a mechanism for alternately imparting thereto an accelerated forward motion and a retarded rearward motion, comprising a plurahty 0t pivoted members one of which has a curved face which extends from the floating end towards the pivot for at least half the table, mechanism ior alternately imparting thereto an accelerated forward motion and a retarded rearward motron, comprising a plurality of overlapping pivoted members one of which has aslightly curved lace which eX-.

t nds from the lloating end towards the pivot for at least one half of the length of said member, a pitman connectedwith oneof said members, a crank for actuating the pitman, a saddle-brass interposed between the crank and pitman, and anequalizing block interposed between the pitmarrand the saddle brass.

12. In combination with a concentrator table, mechanism for alternately imparting thereto an accelerated forward motion and a retarded rearward motion, comprising a pivotcd member having a slightly curved lace which extends from its floating,end towards its pivot, an elbow lever member pivoted at its angle and having one of its arms in rolling contact with the curved face of the inst named member and its other arm adapted to engage the butler-oi the concentrator.

13. In combination with a concentrator table, mechanism for alternately imparting thereto an accelerated forward motion and a retarded rearward motion, comprising a plurality of pivoted members one of which has a slightly curved face which extends from its floating end towards its pivot for at least half the length of said member, said members having a rolling contact between them, means for actuating one of said members, and means adapted to cooperate with the other oi said thereto an accelerated orward motion and a retarded rearward mot-join, com risin a lua slightly curved face which extends from its floating end toward the pivot for at least i half the length of the member, and a pivoted member arranged to have contact with the l concentrator table and also'rolling contact i with the first named pivoted member. I 16. In combination with a concentrator table, mechanism [or alternately, imparting thereto an accelerated forward motionand a retarded rearward mot-ion, com rising a plurality of-overla ping pivoted levers one of which has a slig itly curved lace, said nrembers arranged to have a rolling contact, a crank, a bifurcated pitman actuated by the crank and pivotally connected with the underlying member intermediate of the pivots of said members.

17. In combination with a concentrator table, mechanism for alternately imparting thereto an accelerated l'orward motion and a retarded rearward motion, comprising a pinrality of, p voted members one ol' which has a slightly curved face which extends from the floating end towards the pivot for at least half the length of said member, said meml rality of pivoted members one of which has I l nately recedes from and approaches the respective pivots of the members, a pitman for actuating said members, and means for controlling the operative length of said pitman and the character of the stroke.

18. In combination with a concentrator table, mechanism for alternately imparting thereto an accelerated forward motion and a retarded rearward motion, comprising a pinrality ol pivoted contacting members one of which has a slightly curved face whichextends from its floating end towards the pivot for at least half the length of said member, the members relatively arranged to cause the leverage to vary as the contact point of said members automatically shifts with respect to each other alternately from and towards the respective pivots of said members, apitman for actuating saidmembers, and a set screw for controlling the operative length of said pitman.

19. In combination with a concentrator movement having contacting movable members which lie in substantially horizontal planes, a bed-plate having a sink or tank for the reception ol' said movable members.

20. In combination with a concentrator movement having contacting movable members which lie in substantially horizontal planes and a itman l'or actuating said members, a bed-p late having a sink or tank for the reception of the horizontally disposed movable members. I

21. In combination with a concentrator movement havin movable members which I lie in substantially horizontal planes, a pitman for actuating said members and a crank l for actuating the pitman, a bed-plate having bers having a rolling contact which alterana yse a sink or tank fer the reeeptien of the hon zontally disposed mo able members, and a cover for the tank adapted to inclose said members.

22. In combination with a concentrator movement having movable members which lie in substantially horizontal planes and a pitm'an for actuating said'members, a bedplate having a sink or tank for the reception of said movable members, said imovable members arranged with relation to the tank of thebed-plate so that the greatest displaciements thereof occur at the center of the tan 23. In combination with a concentrator table, mechanism for alternately imparting thereto an accelerated forward motion and a retarded rearward motion, comprising a lu- Iality of pivoted members having rol' g contact between them independent of the 20' means for varying the length of stroke of the said concentrator table, and means for varying the length of stroke of said table.

24. In combination with a concentrator table, mechanism for alternately imparting 25 nesses.

' WILLIAM L. CARD.

FRANK S. CARD. Witnesses:

EDWIN A. SPERRY, PHILO. P. BUsH.

i'vots and 

